This box is great for storing cartridges and stickels BUT please be aware that you are only getting the box, you have to buy the cartridge inserts and the stickle insert seperatly. For someone with a small scraproom and minimum shelf space and who goes on weekend crops and takes their cartridges with them, this is the perfect solution for me. I highly recommend. I have had no problem with the top sticking. It slides off. I don't think it is supposed to come completly off, just enough for you to retrieve your cartridges.
This is that really hard plastic that my mom always called Styrene. I don't know if it's really that stuff, it just feels like it. The lid is a little fiddley it opens on tracks and it's kind of easy to pull off it's track. Now, that being said, they are the right size and shape to hold loads of cricut cartridges and booklets with overlays. They truly are just right. How well they hold up and how well the top works over time, we'll see. I'm glad I got them (I got three of different color lids) and will try to use them to their full extent.